[Bug tree-optimization/26197] New: [4.2 regression] ICE in is_old_name, at tree-into-ssa.c:466

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The following testcase triggers an ICE when compiled with
"-O2 -ftree-vectorize" on x86_64-unknown-linux-gnu (mainline):

=====================================================
struct A
{
  int* x[2];
  A() { for (int** p=x; p<x+2; ++p) *p = 0; }
};

struct B
{
  char c;
  A a0, a1, a2, a3, *p;

  B() {}
  B(const B& b) : c(), a0(b.a0), p(b.p) {}
  ~B() { delete p; }
};

inline void foo(const B& b) { new B(b); }

void bar()
{
  foo(B());
  foo(B());
}
=====================================================

bug.cc: In function 'void bar()':
bug.cc:19: internal compiler error: tree check: expected ssa_name, have
struct_field_tag in is_old_name, at tree-into-ssa.c:466
Please submit a full bug report, [etc.]

This is similar to PR 26169, but hasn't been fixed yet.


-- 
           Summary: [4.2 regression] ICE in is_old_name, at tree-into-
                    ssa.c:466
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26197